Trek Madone/Speed Concept Derailleur Hanger Button Head Bolt M4 x 4mm Black cycling equipment The Shimano GRX RX812 11-speed

The Shimano GRX RX812 11-speed rear derailleur provides silent rear shifting on rough terrain

(L) Stack: 499 mm

Rear Derailleur Mount Type: 10x1 Standard

Bontrager Speed Stop Elite brake caliper

• 2 dust covers

Trek Madone/Speed Concept Derailleur Hanger Button Head Bolt M4 x 4mm Black cycling equipment The Shimano GRX RX812 11-speedFastener Trek Bolt Madone Speed Concept 2011 Black Genuine replacement parts For proper assembly. Derailleur hanger attachment bolt for pre 2012 carbon road frames. Key Features Hanger is sold separately For specific compatibility concerns, please contact our Customer Service team Specifications Color Black Size M4 x 4mm Gender unisex Intended User Age 12 years and over Model Year 2025 Material Components Aluminum